Sash-balance



(mmel') VH. o. OPSAL.

sAsH BALANUE.

No. 269,104T

Patented Dc. 12, 1882'.

,y INVBNTOR.

ORNEYS N, mins. mbmnlmw. www. n. c.

UNITED STATES PATENT OFFICE.,

HANS O. OPSAL, OF RACINE, WISCONSIN.

SASH-BALANCE.

SPECIFICATION forming partof Letters Patent No. 269,104, dated December '12, 1882.

, Application filed September 16, 1882. (No model.)

To all whom 'itmag/ concern Be it known that I, HANS O. OPSAL, of Racine, in the county of Racine and State of Wiscousin, have invented certain new and useful Improvements in Sash-Balances; and I do hereby declare that thefollowingisafull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, which form a part of this specilication, and in which- Figure 1L is a front elevation of a Windowframe provided with my improved sash-balance. Fig. Z is a perspective view of one ot' the balances with its appurtenances. Fig. 3 is a cross-section through the window-frame and balance. t

Similar letters of reference indicate corresponding parts in all the figures. o

My invention has relation to that class of sash balances in which the sash-cord runs over helical pulleys actuated by springs of the saine construction as watch and clock springs, said springs counterhalancin g the, weight of the window-sashes; and it consists in the de` tailed construction of the same, as hereinafter more fully described and claimed. t

In the accompanying drawings, the letter A represents the window frame or casing, and B BI the two sashes. In the upper end of the two jambe, or on the lintel or upper part ot' the i'rame, are fastened by screws or other means two plates, C G, one on each side of the frame. On the outside of these plates, extending into the reveal or open spacebetween the frame and the wall, are two brackets, c c, forming rigid bearings for the axle d, on which turn the spring-barrels D D, and their conical helices or helical pulleys D D. The spring-barrels D D are of the usual construction, having the inner end ot' their spiral springs fastened to the rigid axle d, and have the conical helical pulleys D D rigidly fixed on them, over which the sash cord or wire F runs. Their springs must be of snicient strength to counterbalance the weight of the sash and window-glass, and are wound up when they are put in place by turning the spring-barrel, the axle being rigidly fastened in its bearings, and when the spring is wound holding it fast till the sash-cord is fastened to the sash by means of a screw, gl, passing through plate G, and through a screw-threaded collar, g', so as to bear with its inner end when screwed up against the rim of the spring-bari rel, which can be released after the cord has been fastened, thus allowing the spring to act. The sash-cords pass through transverse slots h in plates C, and over guide-pulleys t', sliding on bars j, which are fastened in both ends in brackets m on the plate G,said slots and pulleys serving to guide the cords into thehelical grooves of the conical pulleys D by the pulleys i sliding on the barj, so as to be immediately opposite that part of the helical groove wherethe cord is, thus preventing the cord from slipping out ofthe groove and the apparatus from getting out of order. The plates C are bent to form channels or recesses, as shown at 7c, for the insertion ofthe cleats separating the ways in which the sashes slide.

This device, while chieiiyintended fora sashbalance, is also applicable to other purposes, and may be used, for example, f'or a lamp-balance, thel lamp simply taking the place of the sash, a suitable support being provided-for,

1. In a sash springbalance, the hollow screw threaded sleeve g', having screw g, adapted to be brought to bear against the rim of the spring-barrel and hold it, substantially as and for the purpose shown and set forth.

l2. In a sash spring-balance, the combination HANS O. OPSAL.

Witnesses; o

NILs ANDERsEN, JOHN B. WINsLoW. 

